Machine for uniting the joints of sheet-metal pipes.



PATENTED APR. 26, 1904.

I. LMULVANEY; MACHINE FOR UNITING'THE JOINTS 0P SHEET METAL PIPES.

APPLIUATIOH FILED SEPT. 2, 1902.

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K0 MODEL.

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PATENTED APR. 26, 190 4.

LJ. MULVANEY. MACHINE FOR UNITING THE JOINTS 0F SHEET METAL PIPES.

APPLICATION FILED 53M. 2 1902.

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, UNITED STATES Patented April 26, 1904.

PATENT OFFICE.

JOHN J. MULVANEY, OF CINCINNATI, OHIO, ASSIGNOR OF THREE-FOURTHS TO CHARLES E. BABBITT AND JOHN L. BROWN, OF CINCINNATI, OHIO, AND HOWARD A; SUTTON, OF WYOMING, OHIO; I I

MACHINEFOR Umrme. THE JOINTS 0F VSHEETI-M-ETAL PIPES.

SPECIFICATION fOIIning part Of Letters Patent No. 758,330, dated April 26, 1904.

i I Application filed September 2, 1802. Serial No. 121,333. .lNo model.) i

To (0Z1- whom, it may concern:

Be it known-that 1, JOHN J. MULvAnnY, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio,-have invented certain new and useful Improvements in Machines for Uniting the Joints of Sheet-Metal Pipes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to simple and eificient mechanism for uniting the joints of sheetmetal pipes, such as stovepipes, in a very secure manner and without the necessity of employing separate rivets and whereby the work can be done with great saving of time and but little expenditure of labor.

The novelty of my invention will be hereinafter more fully set forth, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1, Sheet 1, is a side elevation of a machine embod yin g my invention in one form of construction. Fig. 9, Sheet 1, is a corresponding View of a machine embodying my invention under another form of construction. Fig. 3, Sheet 1, is an enlarged broken sectional detail of the blind-riveting dies. Fig. 4, Sheet 1, is abroken elevation of two united joints of pipe. Fig. 5, Sheet 2, is a side elevation of a machine embodying my invention under a further form' of construction. Fig. 6, Sheet 2, is an end elevation of Fig. 5 looking from the left thereof. Fig. 7, Sheet 2, is an enlarged perspective of a portion of pipe at its joint. 2, is a corresponding view on the dotted line m a: of Fig. 7.

Figs. 1 and 3) it consists of a mandrel or anvil A, having an exterior curvature in cross-section approximatlng that of the oint of pipe which Fig. 8, Sheet secured at one end to any suitable support, as

the edge of a table or bench B, its opposite end being unsupported to permit the section of pipe represented by the dotted lines to he slipped over it. s Projecting up from. the inner end of the mandrel and in this instance secured thereto is a bracketesupport C, with a socket-piece D extending over the top of the mandrel, and suitably guided in said socket-piece is a head or plunger E, whose lower end either has secured to it or formed in it a hemispherical recess d to form a female die.

The upper end of the plunger E is shown engaged by a lever F, weighted at its rear end by a weight G and provided at its forward end with an operating-handle H for reciprocating the plunger, and the lever itself is pivoted, as at is, to ears on the bracket C. Instead of the handpiece H and weight G the lever may be actuated by crank or cam mechanism driven by power, as indicated by the dotted lines.

The top. of the mandrel has a perforation f, inwhich is confined the male die at, whose upper surface, projecting above the top of the mandrel, comes directly under the female die d.

In operation the section of pipe 9, with its longitudinal meeting edges bent in and interlocked after the manner usual in connecting pipe-sections, is first slipped upon the mandrel, and these interlocked meeting edges (indicated at 7), Figs. '7 and 8) are hammered down. Then the ends of the pipe are succes sively slipped over the maledie a and subjected to the action of the female die, which blind-rivets the joint, as seen at 1', which prevents any slipping longitudinally at the joint and forms a secure lock for the section of pipe.

In Fig. 2 I have shown the mandrel as considerably elongated and disposed transversely to the bracket C, which is arranged atabout the center of the mandrel. The ends of the mandrel are supported on brackets I by dowels is, so that either end may be lifted to slip on or off a section of pipe. Two sections which have been blind-riveted on their longitudinal seams can have their ends telescopically united, as seen in Fig. 4:, and then by subjecting such joint to the action of the dies and rotating the sections upon the mandrel they will be blind-riveted together, as at Z. Then when it is desired to unite a large number of sections it is only necessary to support the mandrel at one end, leaving the same long enough to hold two sections at a time, with room to shift them for all the operations necessary to be performed upon them.

In Figs. 5 and 6 I have shown what I consider the most perfect form of construction of a machine embodying my invention. Here the mandrel is supported only at one end, as in Fig. 1, and there are slotted guides at each end thereof, in the slots whereof are confined the ends of a cross-head B having a reciprocal vertical movement given to it by a rope L, passed over a puller M, with its end attached'to the middle of the cross-head, or by any other suitable actuating mechanism. The cross-head in this instance forms the hammer for uniting the longitudinal seams z' of the pipe-sections, while at the same time it coacts with the mandrel and the male die thereon in and a corresponding number of apertures in the mandrel directly under them for the reception of one or more male dies a to suit the character of the Work to be done, as will be readily understood.

Having thus fully described my invention, I claim 1. In a machine of the character described, the combination of a horizontal mandrel free at one end to permit one or more sections of sheet-metal tubing to he slipped over the same, a male die secured thereto and projecting therefrom, a vertically-reciprocating crosshead above and coacting with said mandrel, supports for said cross-head, and a female die, on the under side of said cross-head, arranged over said male die, substantially as described and for the purpose specified.

2. The herein-described machine consisting of the horizontal mandrel A, the cross-head B the slotted guide-supports C for said crosshead, means for vertically reciprocating said cross-head, the male die a secured to said mandrel and the female die 6 formed in the under side of the cross-head, substantially as described.

JOHN J. MULVANEY.

' Vitnesses:

EDWARD PEoK, HUGO FUSSNER. 

